Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare the tool as read-only, idempotent, and non-destructive. The description adds context by specifying the return fields (status, tx hash, amounts, fees, oracle conditions, ESG score, Claude AI reasoning, timestamp), which provides behavioral expectations beyond the annotations. No contradictions.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.